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In the figure, a 160-turn coil of radius 2.8 cm and resistance 7.7 Ω is coaxial...

In the figure, a 160-turn coil of radius 2.8 cm and resistance 7.7 Ω is coaxial with a solenoid of 310 turns/cm and diameter 3.9 cm. The solenoid current drops from 2.1 A to zero in time interval Δt = 31 ms. What current is induced in amperes in the coil during Δt?

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